WO2013081065A1 - Outil de coupe à arête de lame interchangeable et plaquette de coupe - Google Patents

Outil de coupe à arête de lame interchangeable et plaquette de coupe Download PDF

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Publication number
WO2013081065A1
WO2013081065A1 PCT/JP2012/080976 JP2012080976W WO2013081065A1 WO 2013081065 A1 WO2013081065 A1 WO 2013081065A1 JP 2012080976 W JP2012080976 W JP 2012080976W WO 2013081065 A1 WO2013081065 A1 WO 2013081065A1
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WO
WIPO (PCT)
Prior art keywords
lever
cutting
cutting insert
insert
peripheral wall
Prior art date
Application number
PCT/JP2012/080976
Other languages
English (en)
Japanese (ja)
Inventor
亮 比留川
Original Assignee
株式会社タンガロイ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社タンガロイ filed Critical 株式会社タンガロイ
Priority to CN201280059359.5A priority Critical patent/CN103974791B/zh
Priority to EP12852492.3A priority patent/EP2786821B1/fr
Priority to US14/361,633 priority patent/US9566651B2/en
Priority to JP2013547216A priority patent/JP5708823B2/ja
Publication of WO2013081065A1 publication Critical patent/WO2013081065A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • B23B27/1614—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert
    • B23B27/1622—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert characterised by having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
    • B23C5/2226—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts fitted on an intermediate carrier, e.g. shank fixed in the cutter body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/04—Overall shape
    • B23B2200/0423—Irregular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/04—Overall shape
    • B23B2200/0457—Pentagonal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/12—Side or flank surfaces
    • B23B2200/125—Side or flank surfaces discontinuous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/36—Other features of cutting inserts not covered by B23B2200/04 - B23B2200/32
    • B23B2200/3618—Fixation holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/12—Seats for cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/16—Fixation of inserts or cutting bits in the tool
    • B23C2210/163—Indexing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/50—Cutting inserts
    • B23C2210/503—Cutting inserts mounted internally on the cutter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges

Definitions

  • the present invention relates to a cutting edge exchangeable cutting tool and a cutting insert having a cutting edge portion replaceable with the cutting tool, and more particularly, to fix the shape of a through hole formed in the cutting insert and the cutting insert to the body of the cutting tool. This is an improvement of the clamping mechanism.
  • the cutting insert fixing (clamping) method is changed according to the application.
  • the cutting insert in light cutting that does not apply a large cutting resistance to the cutting insert, as represented by outer diameter processing and finishing processing, it is installed inside the body in order to prioritize easy replacement of the cutting insert.
  • a method of clamping using an L-shaped lever is employed (see, for example, Patent Document 1).
  • This type of lever is generally a rod-shaped lever body, a clamp that protrudes laterally from one end of the lever body and presses the cutting insert, and is provided in the middle of the lever body and radially outward. And a protruding portion that protrudes.
  • the lever body is housed in the hole drilled in the body so that the clamp portion side of the lever is positioned on the through hole side formed in the cutting insert, and in this state, the other end side of the lever body
  • the cutting insert is fixed by inclining the lever with the protruding portion as a fulcrum and pressing the cutting insert against the peripheral wall of the insert fixing portion (chip seat) of the body with the clamp portion of the lever as the operating point.
  • a clamping method by screwing is used so that the clamping force becomes stronger.
  • the problem is that a cutting insert having an acute corner represented by a V-shaped cutting insert prescribed by ISO (a corner when the angle between side surfaces extending from both ends of the corner is an acute angle) is fixed.
  • a cutting insert having an acute corner represented by a V-shaped cutting insert prescribed by ISO a corner when the angle between side surfaces extending from both ends of the corner is an acute angle
  • Another problem is that conventional cutting inserts do not take into account the common use of a cutting tool that employs a clamping method using a lever and a cutting tool that employs a clamping method using a screw. That is, conventionally, a cutting insert used for a cutting tool using a clamp method using a lever cannot be used for a cutting tool using a clamp method using a screw. Therefore, even if the dimensions are the same, two types of cutting inserts must be prepared in order to cope with light cutting and heavy cutting, which may cause a problem of increased management costs. .
  • the present invention has been made in view of the above problems. That is, to provide a cutting insert that can be shared between a clamp method using a lever and a clamp method using a screw, and a lever-type blade tip exchange-type cutting tool that uses the cutting insert and has a higher clamping force than conventional ones. Objective.
  • a first aspect of the present invention is a cutting insert used for a cutting edge exchangeable cutting tool, Comprising a through hole (26) formed between the opposing first surface (22) and second surface (25);
  • the through hole (26) A first portion defining a first space adjacent to the first surface (22);
  • a second portion defining a second space adjacent to the second surface (25) that is larger than the first space; It has a constricted portion (26c) provided between the first portion and the second portion so as to connect the first space and the second space.
  • the 2nd form of this invention is a blade-tip-exchange-type cutting tool (A) which uses the cutting insert (2) which concerns on the said 1st form so that replacement
  • the body (1) has an insert fixing portion (11) for mounting the cutting insert (2), and the insert fixing portion (11) is mounted with the cutting insert (2) mounted thereon.
  • the one end (31) of the lever (3) protrudes from the mounting surface (12) of the insert fixing portion (11) and is accommodated in the second portion (26b). Placed below The position at which the pressing force of the pressing member (4) acts and the position of the fulcrum are determined so that the lever (3) is inclined such that the one end (31) moves forward in the pressing direction by the pressing member (4). It is characterized by being.
  • the 3rd form of this invention is the blade-tip-exchange-type cutting tool (A) which uses the cutting insert (2) so that replacement
  • the body (1) has an insert fixing part (11) for mounting the cutting insert (2), and the mounting for mounting the cutting insert (2) on the insert fixing part (11).
  • the one end (31) of the lever (3) protrudes from the mounting surface (12) of the insert fixing portion (11) and is accommodated in the space defined by the portion (26b).
  • the position at which the pressing force of the pressing member (4) acts and the position of the fulcrum are determined so that the lever (3) is inclined such that the one end (31) moves forward in the pressing direction by the pressing member (4). It is characterized by being.
  • the cutting insert (2) according to the first embodiment of the present invention, it is possible to cope with both cutting tools using a cutting method using a clamp method using a lever and a cutting tool using a clamping method using a screw. Cost can be reduced.
  • a press member (4) centered on the fulcrum on a lever (3).
  • the position where the pressing force of the pressing member (4) acts and the position of the fulcrum are determined so that the lever (3) in which the one end (31) acting on the clamping force moves forward in the pressing direction is inclined. .
  • a pressing force can be applied at a position close to one end (31) of the lever (3), and the pressing force applied to the lever (3) is more efficiently transmitted to the cutting insert (2) than in the conventional configuration.
  • the clamping force by the lever (3) can be increased.
  • FIG. 1 is an enlarged perspective view of the distal end portion of the cutting edge replacement type cutting tool of the present embodiment.
  • 2 is a cross-sectional view taken along the line II-II in FIG.
  • FIG. 3A is a perspective view of the cutting insert according to the present embodiment as viewed from the upper surface side.
  • FIG. 3B is a perspective view of the cutting insert according to the present embodiment as viewed from the bottom surface side.
  • FIG. 4 is a top view of the cutting insert of the present embodiment.
  • FIG. 7A is a perspective view of the lever of this embodiment.
  • FIG. 7B is a perspective view of the lever of this embodiment as viewed from the side opposite to FIG. 7A.
  • FIG. 8A is a side view of the lever of this embodiment.
  • FIG. 8B is a front view of the lever of this embodiment.
  • FIG. 8C is a bottom view of the lever of this embodiment.
  • FIG. 9 is an enlarged view of the insert fixing portion of the present embodiment.
  • FIG. 10 is a sectional view taken along line XX of FIG.
  • FIG. 11 is a schematic top view showing the shape of the peripheral wall of the insert fixing portion.
  • FIG. 12 is an enlarged cross-sectional view showing a state in which the cutting insert of the present embodiment is clamped by a screw.
  • FIG. 1 and FIG. 2 are views showing a blade-tip-exchangeable cutting tool according to this embodiment.
  • the cutting edge exchange type cutting tool A of the present invention includes a body 1, a lever 3 for clamping the cutting insert 2, a screw 4 that is a pressing member that presses and tilts the lever 3, And a spring 5.
  • the tip of the blade-tip-exchange-type cutting tool A is the left part of FIG. 2, and the rear end is the right part of FIG.
  • a part of the tip of the body 1 is cut out in a shape similar to the shape of the cutting insert 2, thereby forming the insert fixing portion 11 for arranging the cutting insert 2.
  • an arrangement space B is formed below the insert fixing portion 11, and the lever 3, the screw 4, and the spring 5 are arranged there.
  • the spring 5 and the lever 3 are arranged in order from the rear end (right side in FIG. 2) of the body 1, and the screws 4 are arranged so as to penetrate both of them.
  • the space C in which the lever 3 is arranged is formed in the middle of the arrangement space B so as to cross the arrangement space B up and down, and the size thereof is larger than the size of the lever 3. Therefore, when the head of the screw 4 presses the lever 3, the lever 3 can be tilted in the space C as shown in FIG.
  • the space C communicates with the insert fixing portion 11, and the upper end portion of the lever 3 disposed in the space C protrudes from the mounting surface 12 (see FIG. 9) of the insert fixing portion 11.
  • the spring 5 applies a biasing force toward the tip of the body 2 to the lever 3, and when the head of the screw 4 is disengaged from the lever 3, the posture of the tilted lever 3 is initialized as described later. Play the function of returning.
  • the cutting insert of the present embodiment has a pair of side surfaces 27 adjacent to each other with an acute angle, and a pair of side surfaces 27 extending in an obtuse angle from each of the pair of side surfaces 27 on the side opposite to the portion forming the acute angle and facing in parallel. It has a substantially pentagonal prism shape including an opposing side surface and a side surface formed so as to be perpendicular to each of the opposing side surfaces. That is, the cutting insert 2 of this embodiment has a substantially pentagonal shape similar to the shape of a baseball base when viewed in plan. As shown in FIG. 1, FIG. 3A, FIG. 3B, and FIG.
  • a cutting edge 24 is formed at the intersecting ridge line portion between the upper surface 22 of the cutting insert 2 and the side surface 23 facing the tip of the cutting edge-exchangeable cutting tool A.
  • the cutting insert 2 includes a through hole 26 penetrating from the upper surface 22 toward the lower surface 25.
  • the through-hole 26 allows the insertion of a screw toward the screw receiving portion formed on the mounting surface 12 when the cutting edge replacement cutting tool A is to perform clamping with a screw.
  • the through hole 26 of the present embodiment includes a small diameter portion 26 a that is a first portion formed adjacent to the upper surface 22 and a large diameter portion that is a second portion formed adjacent to the lower surface 25. 26b, and a constricted portion 26c that connects the space defined by the small diameter portion 26a and the space defined by the large diameter portion 26b.
  • the diameter of the large diameter part 26b is larger than that of the small diameter part 26a. Therefore, the large diameter portion 26b defines a space larger than the space defined by the small diameter portion 26a.
  • the inner wall that defines the large diameter portion 26b is located farthest from the central axis of the through hole 26. is there.
  • the large diameter portion 26b is a portion where the upper end portion of the lever 3 is accommodated when the cutting insert 2 is placed on the insert fixing portion 11, and the upper end portion of the lever 3 presses the inner wall of the large diameter portion 26b.
  • the insert 2 is fixed.
  • the small diameter portion 26a is a portion that accommodates the head of the screw when the cutting insert 2 is used in a cutting tool that employs a clamping method by screwing.
  • the constricted portion 26c is inserted into the cutting insert 2 by the head of the screw inserted through the through hole 26 coming into contact therewith. Press toward the mounting surface 12 of the fixed part.
  • the lever 3 is a rod-like member having a substantially quadrangular prism shape, and generally has an upper end 31 protruding from the mounting surface 12 and a lower side of the upper end 31. And a lower end 33 formed on the lower side of the main body 32.
  • the back surface 32a of the main body portion 32 arranged to face the front end side of the body 1 has a back surface lower portion 32a1 that inclines toward the left side in FIG. 8A from a portion connected to the bottom surface when the bottom surface of the lower end portion 33 is used as a reference for the angle.
  • the rear upper portion 32a2 is connected to the lower back portion 32a1 and is inclined from the connecting portion 32a3 toward the right side of FIG. 8A. That is, the angle ⁇ formed by the lower back surface 32a1 and the bottom surface of the lower end 33 is an obtuse angle.
  • the connecting portion 32a3 between the lower back surface 32a1 and the upper back surface 32a2 is the portion that is positioned most distally when the lever 3 is disposed on the body 1.
  • the screw 4 pushes the connecting portion 32a3 to tilt the lever 3 from the initial state.
  • the front surface 32b of the main body 32 which faces the rear end side of the body 1, that is, on the opposite side of the back surface 32a, is located on the right side of FIG.
  • the angle ⁇ formed by the front lower portion 32b1 and the front upper portion 32b2 is an obtuse angle.
  • the front lower portion 32b1 and the front upper portion 32b2 form an obtuse angle ⁇
  • the connecting portion 32b3 is more than the portion of the upper end portion 31 of the lever 3 that contacts the inner wall of the large diameter portion 26b of the through hole 26.
  • the lever 3 Since the fulcrum is positioned on the rear end side of the body 1 with respect to the action point by being positioned on the rear end side, the lever 3 is applied when a force is applied to advance the screw 4 and tilt the lever 3 as will be described later.
  • the upper end portion 31 applies a diagonally downward force to the cutting insert 2. Thereby, the cutting insert 2 receives not only the force pushed toward the peripheral wall but also the force pushed toward the mounting surface 12.
  • the connecting portion 34 between the main body portion 32 and the lower end portion 33 is formed so as to be retracted. Therefore, when the lever 3 is inclined, contact with the step portion 6 described later is avoided.
  • a part of the lower end portion 33 is notched and is smaller than the main body portion 32.
  • a notch 33a is formed in the right side portion of the lower end portion 33 in FIGS. 7B and 8B (left side portion in FIG. 7A).
  • This notch 33a engages with a step 6 formed in the lower part of the space C formed in the body at the position shown in FIGS.
  • the step 6 is not formed over the entire circumference of the bottom of the space C, and there is a portion where the step 6 is not formed. In a place where the step portion 6 is not formed, the bottom surface of the space C and the peripheral wall are directly connected.
  • the lever 3 is formed with a screw insertion hole 35 penetrating from the front surface 32b of the main body 32 toward the back surface 32a. After the lever 3 is disposed in the space C, the screw 4 is inserted into the screw insertion hole 35. As shown in FIGS. 7A and 7B, the screw insertion hole 35 has an elliptical shape having a width in the left-right direction having a dimension corresponding to the outer diameter of the screw 4 and a height in the vertical direction longer than this. ing. With such a shape, the left and right movement of the screw 4 is suppressed, and the front and rear movement of the screw 4 becomes smooth.
  • FIG. 9 is an enlarged view showing the insert fixing portion.
  • the insert fixing portion 11 is formed with a pair of peripheral walls 11 a so as to sandwich a side ridge portion 27 connected to the acute corner portion 21 when the cutting insert 2 is disposed.
  • the angle formed by the peripheral walls of the insert fixing portion is not constant as shown in FIG. 9, but the angle is gradually reduced from the front end side of the body 1. That is, as shown in FIG. 11 which is a schematic top view of the insert fixing portion, the angle formed by the pair of third peripheral wall regions 300 located closest to the distal end portion is ⁇ 3, and the pair of second connected to the third peripheral wall region.
  • the angle between the peripheral wall regions 200 is ⁇ 2, and the angle between the pair of first peripheral wall regions 100 connected to the second peripheral wall region is ⁇ 1, there is a relationship of ⁇ 3> ⁇ 2> ⁇ 1.
  • the angle ⁇ 1 and the angle ⁇ 2 are smaller than the angle formed by the acute corner portion 21 of the cutting insert 2, and the angle ⁇ 3 is larger than the angle formed by the acute corner portion 21 of the cutting insert 2.
  • ⁇ 1 ⁇ 1.5 °
  • ⁇ 2 ⁇ 0.5 °
  • ⁇ 3 ⁇ + 0.5 °.
  • Each side surface connected to each side ridge portion 27 of the cutting insert 2 abuts at one point of the connection portion 250 between the second peripheral wall region 200 and the third peripheral wall region 300.
  • the head of the screw 4 applies a force to the main body 32 of the lever 3.
  • the lever 3 that has received the pressing force from the screw 4 is inclined with the connecting portion 32b3 of the front surface 32b of the lever main body abutting the inner wall of the body 1 facing the arrangement space C as a fulcrum, and the upper end 31 is the rear end of the body 1 It tries to move forward in the pressing direction by the head side of the screw 4.
  • the upper end portion 31 applies a force to the inner wall defining the large diameter portion 26 b of the through hole 26, and presses the cutting insert 2 against the peripheral wall 11 a of the insert fixing portion 11.
  • the contact portion between the cutting insert 2 and the peripheral wall 11a of the insert fixing portion 11 is elastically deformed, and the cutting insert 2 and the peripheral wall 11a are in surface contact or line contact.
  • the clamping state of the cutting insert 2 is released by returning the posture of the lever 3 to the initial state by applying the force of the spring 5 to the lever 3 toward the tip of the body 1 as the screw 4 is retracted. (Unclamped).
  • the present embodiment it is possible to efficiently transmit the pressing force of the lever 3 to the cutting insert 2, and the clamping force is larger than that of the conventional clamping method using the lever.
  • the head of the screw 4 applies a force for inclining the lever 3 (power point) and the front upper and lower front connecting portions 32b3.
  • the distance from the fulcrum is extremely close, and the lever 3 does not bend during clamping. Therefore, the force applied to the lever 3 is efficiently transmitted to the cutting insert 2, and the cutting insert 2 is reliably clamped with a small amount of movement of the screw 4. Therefore, it functions effectively when clamping a cutting insert having a long length from the center of the through hole to the corner, such as a V-shaped cutting insert.
  • the shape of the peripheral wall 11a of the insert fixing part 11 contributes to the improvement of the clamping force.
  • the peripheral wall is formed so that the angle formed by the peripheral walls is constant and the angle is larger than the angle of the acute corner of the cutting insert 2, but the cutting edge exchangeable cutting tool of the present embodiment ( A) is a stepwise change in the angle formed by the pair of peripheral walls 11a as shown in FIG. 11, so that the point at which the cutting insert 2 contacts / detaches from the peripheral wall 11a is biased toward the rear end side of the body 2. I am letting.
  • the side surface connected to the side ridge portion 27 of the cutting insert 2 has a spread angle smaller than the corner angle and the third peripheral wall region 300 that forms a spread angle larger than the acute corner angle. It abuts on the connecting portion 250 with the second peripheral wall region 200.
  • the second peripheral wall region 200 is elastically deformed starting from the connecting portion 250, but the second peripheral wall region 200 has a spread angle smaller than the angle of the acute corner, so that cutting is performed. Contact between the insert 2 and the peripheral wall 11a is always maintained. Further, when the cutting force (particularly the back component force) is applied repeatedly, the second peripheral wall region 200 spread angle is expanded to be larger than the angle of the acute corner, and the side surface connected to the side ridge 27 of the cutting insert 2 Is in contact with the connecting portion 150 (see FIG. 11) between the second peripheral wall region 200 and the first peripheral wall region 100, so that the clamping performance can be maintained over a longer period than in the conventional example.
  • the peripheral wall structure of the present embodiment works particularly effectively when the angle ⁇ 1 is an acute angle, particularly 60 ° or less.
  • FIG. 12 is a cross-sectional view showing a state in which the cutting insert 2 of the present embodiment is clamped to the body 1 ′ with the screw 10.
  • the screw 10 passes through the through hole of the cutting insert 2 and enters the inside of the body 1 ′.
  • a screw receiving portion C ′ is formed so that the screw receiving portion C ′ is obliquely screwed into the screw.
  • the through hole has a cylindrical shape having a certain diameter, even if there is a slight positional deviation between the opening on the lower surface side of the insert of the through hole and the opening of the screw receiving portion C ′ of the mounting surface 12, Since the screw 10 comes into contact with the inner wall of the through hole, the screw 10 cannot penetrate the mounting surface 12 of the insert fixing portion 11, and the progress of the screw is hindered.
  • the through hole 26 of the cutting insert 2 of the present embodiment is provided with the large-diameter portion 26b at the lower part, adjustment of the angle at which the screw is tilted or the position of the screw tip is allowed, and the inner wall of the through hole 26 is threaded.
  • the head of the screw 10 accommodated in the small-diameter portion 26a can press the constricted portion 26c and can clamp the cutting insert 2 without hindering the progression of 10.
  • the cutting insert 2 of the present embodiment can cope with both a clamp method using screws and a clamp method using levers.
  • the cutting insert 2 can be clamped more firmly than before by using the cutting insert 2 together with the body 1, the lever 3, and the like. This is effective when clamping a cutting insert having an acute corner with a length extending from the center of the through hole to the corner, but the present invention can also be applied to clamping a cutting insert having another configuration. Is.
  • the cutting edge exchangeable cutting tool of the present invention is not limited to the above-described embodiment.
  • the present invention can also be applied to a turning tool in general such as a turning tool for outside diameter machining, a turning tool for inside diameter machining, or a turning tool.
  • the small-diameter portion 26a that is the first portion and the large-diameter portion 26b that is the second portion provided in the through-hole of the cutting insert also define a space that can accommodate the screw 10 and the lever upper end 31, respectively.
  • a rectangular shape may be used.
  • the constricted portion 26 c may not be provided over the entire inner periphery of the through hole 26 as long as it can abut against the head of the screw 10 and appropriately receive the pressing force.
  • the screw 4 is inserted into the screw insertion hole 35 provided in the lever 3 in a loosely fitted state.
  • a female screw hole that engages with the screw thread of the screw 4 is formed in the lever itself. It is also possible. In this case, there is no need to consider the deviation between the central axis of the screw insertion hole and the central axis of the female screw behind the screw insertion hole, which is advantageous in facilitating the clamping operation.
  • the peripheral wall of the insert fixing portion 11 is configured by three pairs of peripheral wall regions.
  • a configuration in which two pairs of peripheral wall regions are provided for example, the peripheral wall region 300 and the peripheral wall region 200 described above are each paired. Configuration provided) or a configuration in which four or more pairs of peripheral wall regions are provided may be employed.
  • the spring 5 in the form of a coil spring is used as an elastic member for urging the lever 3 to the initial position, but other elastic members such as a leaf spring can also be used.
  • the pressing member that presses the lever is not limited to the screw 4 as in the above-described embodiment, but includes a spring that can press the lever 3 preferably in another form, for example, a spring constant higher than that of the spring 5.
  • a mechanism including a pressing mechanism or a pressing pin may be employed.
  • the formation position of the step portion 6 formed in the space for accommodating the lever is not limited to that of the above embodiment, and the purpose of specifying the direction of the lever that can be accommodated in one direction can be achieved. For example, it may be formed limited to a smaller range.
  • the lever 3 is also a rod having a substantially quadrangular prism shape in the above-described embodiment, but it is needless to say that the lever 3 can have an appropriate shape. That is, as long as the above-described effects can be achieved, for example, a cylindrical shape or a substantially plate shape may be used.
  • a connection part 32b3 which protrudes in the rear-end direction from the front surface 32b of the lever main body 32 was made into the lever of this operation
  • a portion protruding in the tip direction may be provided on the inner wall of the arrangement space C of the lever 3, and a fulcrum may be formed by contacting the portion with the front surface 32b.
  • the front surface 32b and the rear surface 32a of the lever 3 may be formed.
  • Protrusions are provided on the two side surfaces that connect to each other, and holes (or protrusions) are provided on the inner wall of the arrangement space C facing these side surfaces, and the protrusions and the holes are engaged to form a branch. It may be done.
  • the configuration of the above-described blade-tip-exchange-type cutting tool is premised on not only the case of using the cutting insert 2 that can be used for both the clamp method using a lever and the clamp method using a screw, but also the clamp method using a screw. It is also possible to use a cutting tool that does not.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Knives (AREA)
  • Details Of Cutting Devices (AREA)

Abstract

L'invention porte sur un outil de coupe du style à verrouillage à levier à arête de lame interchangeable qui possède une force de serrage plus élevée que celle qui était classique. Un levier en forme de colonne (3) est disposé sous une section de fixation de plaquette (11) dans l'état d'une extrémité (31) qui fait saillie sur la surface porteuse (12) de la section de fixation de plaquette (11). Une vis (4), qui amène ladite extrémité (31) à exercer une force de serrage sur une plaquette de coupe (2) au moyen de la pression sur le levier (3) qui amène le levier (3) à s'incliner autour d'un pivot qui est une position (32b3) située sur la longueur du levier (3), est amenée à appliquer une force de pression sur le levier (3) entre ladite extrémité (31) et la position (32b3).
PCT/JP2012/080976 2011-11-30 2012-11-29 Outil de coupe à arête de lame interchangeable et plaquette de coupe WO2013081065A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201280059359.5A CN103974791B (zh) 2011-11-30 2012-11-29 刀头更换式切削工具及切削刀片
EP12852492.3A EP2786821B1 (fr) 2011-11-30 2012-11-29 Outil de coupe à arête de lame interchangeable et plaquette de coupe
US14/361,633 US9566651B2 (en) 2011-11-30 2012-11-29 Replaceable-blade-edge cutting tool and cutting insert
JP2013547216A JP5708823B2 (ja) 2011-11-30 2012-11-29 刃先交換式切削工具および切削インサート

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-261693 2011-11-30
JP2011261693 2011-11-30

Publications (1)

Publication Number Publication Date
WO2013081065A1 true WO2013081065A1 (fr) 2013-06-06

Family

ID=48535513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/080976 WO2013081065A1 (fr) 2011-11-30 2012-11-29 Outil de coupe à arête de lame interchangeable et plaquette de coupe

Country Status (5)

Country Link
US (1) US9566651B2 (fr)
EP (1) EP2786821B1 (fr)
JP (1) JP5708823B2 (fr)
CN (1) CN103974791B (fr)
WO (1) WO2013081065A1 (fr)

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WO2013156991A1 (fr) * 2012-04-19 2013-10-24 Iscar Ltd. Outil de coupe et support d'outil de coupe comportant une tige de levier

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DE102016117198A1 (de) * 2016-09-13 2018-03-15 Kennametal Inc. Werkzeughalter für eine Wendeschneidplatte und Schneidwerkzeug
CN109663937B (zh) * 2019-03-04 2023-08-22 四川道勤切削工具有限公司 内孔端面槽加工刀具
JP6838674B1 (ja) * 2020-05-29 2021-03-03 株式会社タンガロイ 切削工具
JP7024894B1 (ja) * 2021-01-13 2022-02-24 株式会社タンガロイ 工具本体
CN113649605A (zh) * 2021-07-05 2021-11-16 张洁泓 一种复合式涂层pcbn切削刀具及其制备方法
TWI806763B (zh) * 2022-09-08 2023-06-21 鼎鎮實業有限公司 組合式刀具

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WO2013156991A1 (fr) * 2012-04-19 2013-10-24 Iscar Ltd. Outil de coupe et support d'outil de coupe comportant une tige de levier
US8573900B1 (en) 2012-04-19 2013-11-05 Iscar, Ltd. Cutting tool and cutting tool holder having lever pin

Also Published As

Publication number Publication date
US9566651B2 (en) 2017-02-14
EP2786821B1 (fr) 2022-08-17
US20140334889A1 (en) 2014-11-13
CN103974791B (zh) 2016-08-24
EP2786821A1 (fr) 2014-10-08
JPWO2013081065A1 (ja) 2015-04-27
CN103974791A (zh) 2014-08-06
EP2786821A4 (fr) 2015-08-05
JP5708823B2 (ja) 2015-04-30

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